Chapter – 3
Hardware
2018
1. An air conditioning system is used to control the temperature in a hospital.
2. Primary, secondary and off-line are types of storage.
3. The table shows a segment of primary memory from a Von Neumann model computer.
4. A hospital stores the results of medical tests on a computer system. Each patient is given a
wristband containing a unique barcode. The barcode is used every time the patient has a medical
test.
5. Six components of the Von Neumann model for a computer system and six descriptions are given.
6. A supermarket uses a barcode scanner to read the barcodes on its products.
7. A business wants to use a biometric security system to control entry to the office.
8. Kelvin correctly answers an examination question about the Von Neumann model.
Eight different terms have been removed from his answer.
Complete the sentences in Kelvin’s answer, using the list given.
Not all items in the list need to be used.
9. An advertisement in a magazine displays this barcode.
10. Alexandra has a new mobile device.
11. State five sensors that could be used in the following applications.
Give a different type of sensor for each application.
12. A train station uses large touch screens to allow passengers to search for train information and
buy tickets.
13. Explain how an instruction is fetched in a computer based on the Von Neumann model.
14. Identify three similarities between CDs and DVDs.
15. Five storage devices or media are listed in the table.
16. Users can store their data on optical storage media. Explain how data is written to optical storage
media.
17. A sports events company uses a digital camera attached to a drone (small flying system), to
video their events from the sky.
The video is stored as it is captured, on a device that is attached to the drone.
18. Two examples of output devices are a 3D printer and a 3D cutter.
19. A sports stadium uses a pressure sensor and a microprocessor to monitor the number of people
entering the sports stadium. For the counter to increment the weight on the pressure sensor must
exceed 5 kg.
Explain how the system uses the pressure sensor and the microprocessor to monitor the number
of people entering.
20. A computer uses RAM and ROM to store data.
21. Answer the following questions.
22. A system uses pH sensors and a microprocessor to help monitor pollution in a river.
The pH of the water should be between 6 and 8. The system outputs an alert if the pH of the water
is not in this range.
Explain how the system uses the pH sensors and the microprocessor to help monitor the pollution.
23. There are six output devices and six descriptions shown.
24. Sarah stores data electronically.
Describe three methods that she could use to avoid loss of stored data.
25. Describe two differences between Read Only Memory (ROM) and Random Access Memory
(RAM).
26. The fetch-execute cycle make use of registers.